Build all 70 models - or anything you can imagine with the 70 Model Ultimate Building Set! This 702 piece set includes building ideas for a hot air balloon, boats, trucks, a sand castle and more! Set includes a convenient storage treasure chest, large enough to fill with other K'NEX sets! Recommended for builders ages 7+ Includes 70 model building ideas 705 pieces to build a hot air balloon, boats, trucks, a sand castle and more! Convenient storage treasure chest to hold built figures and other K'NEX sets Made in the USA Recommended for builders ages 7-Plus